The closest I was to get -current working gave me this but I'm unsure where this fails (my best guess would be that something went wrong while loading the second FFSv2 partition)
SUCCESS!! All thanks to @0x47DF@twitter.com 🙏
Steps to get it to work:
1) Update your eeprom to at least 2020-09-03 (https://github.com/raspberrypi/rpi-eeprom/releases/tag/v2020.09.03-138a1). This is necessary to allow EFI partitions to boot
2) Flash your sdcard with 2020-12-09-netbsd-raspi-aarch64.img from http://mail-index.netbsd.org/port-arm/2020/12/09/msg007119.html
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